Feeding device for mi ddlings-puri fiers



(No Model.)

3 Sheets-Sheet 1. G. A. SMITH.

FEEDING DEVICE FORv MIDDLINGS PURIFIERS.

Patented Mar. 80, 188.6.

may/93,965.

' IW2/&wtazaw a m. .PUERS, Phawuflwgm mn Washington. n. C,

(No Model.)

3 Sheets-Sheet 2.

Pgtegted Mar. 30, 1886.

134/ mama? (No Model.) 3 Sheets-Sheet 3.

C. A. SMITH.

FEEDING DEVICE FOR MIDDLINGS PURIFIERS.

No. 339,029. Patented Mar. 30, 1886.

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CHARLES A. SMITH, OF JACKSON, MICHIGAN.

FEEDING DEVICE FOR MiDDLiNGS-PURIFIERS.

SPECIFICATION forming part of Letters Patent No. 339,029, dated March30, 1886.

Application filed July 9, 1884. Serial No. 137,242. (No model.)

To all whom, it may concern:

Be it known that I, CHARLES A. SMITH, a citizen of the United States,residing at J ackson, in the county of Jackson and State of Michigan,have invented certain new and useful Improvements in Feeding Devices forMiddlings Purifiers, of which the following is a specification,reference being had therein to the accompanying drawings.

Figure 1 is a side elevation of one end of a middlings-purifier havingmy invention applied thereto. Fig. 2 is a detached view, enlarged, of myinvention, part of the machine being in elevation, taken on line :0 m,Fig. 4. Fig. 3 is a vertical longitudinal section taken on line 3 y,Fig. 4. Fig. 4 is a plan view taken on line 2 a, Fig. 2. Fig. 5 is avertical longitudinal section of a part, showing a modification.

A A are the front posts; 13 B, horizontal girts; and a: a the casing,which may be of any usual or approved construction.

0 is a front girt crossing the machine about midway between its top andbottom, and D D d d indicate the shaker and cloth-bars, these latterparts being preferably of the construction shown in Patent No. 259,639,to Milford Harmon; but, as this feeding mechanism is adapted for useupon many forms of shakers, I do not wish to be limited to theconstruction herein shown and referred to. The shaker may be suspendedupon pendulum links and reciprocated by means of an eccentricshaft, E,mounted in bearings c, (attached to the vertical posts A A of thepurifier,) and pitmen F, connecting the shaft with a transverse bar, f,framed at its ends into the side pieces of the shaker.

I will now proceed to describe in detail the feeding mechanism ordevices to which this invention relates.

G is a bottom board, the forward ends of which are expanded, as at gFigs. 2 and 4., and secured to the upper edges of the sides of theshaker-frame, so as to travel therewith. The upper surface of thisbottom board is in clined, so that its lower edge, which is arrangednear the head end of the shaker, is the lowest.

H is the front vertical wall; J, the rear wall, and t i the side boards.

K is the top or deck, making a practicallyinclosed box, except that thefront board or wall, H, is narrower than either the sides or the rearwall, so as to leave a narrow throat, h, (see Figs. 2 and 3,) betweenthe lower edge of the front board, H, and the bottom board, G.

J is a vibrating carrier, pivoted to the sides at j j. This vibratingcarrier J is of such length as to fit closely inside of the sides '5 i,and is preferably of such width as to project through the throat h, toreceive plates or bars Z Z, which are attached to the under surface ofthis vibrating carrier at its sides and project in front of and beyondthe sides i t.

L L are plates or hangers attached to the upper face of the deck K,directly above the bars Z Z, with which they are connected by elastic oryielding links, each consisting, in this instance, of an eyebolt, M, andspiral spring 121., so that by turning the thumb-nuts on the upper endsof the eyebolts the upward lift or pull upon the vibrating carrier J canbe regulated at the will of the operator.

N is a spout-section attached to and projecting down through the deck K.

O is a feeding-spout communicating at its upper end with some convenientsource of supply and projecting thence downwardly into the upper open.end of the spout-section N. The feeding-spout is secured to thepurifier.

From an examination of the drawings it will be readily understood thatas the shaker and these feeding devices vibrate, the middlings,which arefed in through the spout O and fall upon the vibrating carrier J ,willbe fed through the throat which exits between the upper surface of thisvibrating carrie and the lower edge of the front board or wall, H,whenever the tension of the spiral springs in is properly regulated, andit will also be understood that by means of the thumb-nuts a n the widthof this discharge-throat can be varied at the will of the operator asthe existing conditions of material and the work to be done may renderdesirable. Of course the width of this discharge-throat will depend uponboth the tension of the springs and the weight of the iniddlings uponthe vibratingcarrier J, from which it will be understood that anyincrease in the accumulation of middlin gs upon this carrier willincrease the width of the throat (unless the position of the thumbnutsbe changed) and thus gradually work off any such accumulation, afterwhich the throat will be again narrowed, so that even with the the boardJ is at its rear end hinged near the deck or flooring K, and is providedwith an opening, J", immediately below the spoutsection N, and of suchsize as to permit the middlings to flow freely through such opening intothe space between the inclined board J and the bottom board, G. Theforward end of this inclined board also projects through thelongitudinal slot h and is connected with the plates or hangers L bymeans of a bolt, M, threaded at its upper end and provided with athumb-nut, n. A spiral spring, m, surrounds this bolt with its upper endengaging with the under side of the bar L and its lower end bearingagainst the upper surface of the board J. There are of coursecorresponding bolts and springs at each side of the shaker, so that thewidth of the throat between the lower edge of this inclined board andthe adjacent edge of the bottom or of a rib upon the bottom board can beregulated with great accuracy to determine the rate of feed, and at thesame time the width of this throat can be increased by any unusualincrease of pressure upon the bed of middlings between the board J andthe bottom board, G, to permit the passage of any lumps of material orforeign substance which may happen to be mixed with the middlings. Thisfeeder will properly deliver middlings to the screen without producingthat objectionable attrition or rubbing of particles against one anotherwhich is liable to result from the use of rollers or any other devicesin which the feeding is effected by either a rolling or vibratingmovement of one wall of the throat relative to its opposing wall, whichattrition is liable to injure the middlings by reducing their sharpness.

I do not wish to be limited to the use of springs for moving thedischarging edgethat is to say, the front edge of the vibratingcarrier-upward toward the lower edge of the front vertical wall or sideboard, because under some circumstances a counterbalancingweight mightbe used for that purpose.

It will be understood that in all of the constructions shown there is afeeding throat formed between the front edge of a vibrating board and anadjacent parallel edge of the feeder, a short spout-section attached toand carried by the body of the feeder, and another spout supportedindependently of the vibrating parts of the feeder. It will also be seenthat in all of the constructions shown the vibrating board which formsone side or wall of the throat is supported at one edge by means ofadjusting devices, and can also yield to permit a more rapid feeding ofthe material in case of an increased pressure or supply, and also topermit the passage of any foreign substances. Of course many other formsof springs or elastic or yielding links might be substituted for thoseshown by any mechanic who is skilled in the art of constructing suchdevices.

What I claim is 1. In a vibrating feeder, the combination of an inclosedbox, a movable carrier situated above the bottom of said box and adaptedto adjust the width of the throat through which the middlings aredischarged, and a tension device which regulates the position of themovable carrier. and therefore the width of the discharge-throat, butwhich permits the carrier to move when subject to unusual pressure,substantially as set forth.

2. In a vibrating feeder, the combination of an inclosed box having anupper board and a lower board, between which the material passes, and ofwhich one is pivoted and has one edge movable about its pivot toincrease or diminish the throat through which material passes, means foradjusting one edge of the movable board relative to the adjacent portionof the other board, and a spring applied to the movable board andadapted to maintain a uniform width of the feedingthroat, but whichpermits the edge of the movable board to yield under pressure,substantially as set forth.

3. In a vibrating feeder, the combination of an inclosed box having anupper board and a lower board, between which the material passes, and ofwhich one is pivoted and has one edge movable about its pivot toincrease or diminish the throat through which material passes, thespout-section supported upon the inclosed box and opening into the box,and a feed-spout of less diameter than the spoutsection, and having itslower end arranged within the spout-section and supported independentlyof the vibrating parts of the feeder, substantially as set forth.

4. In avibrating feeder, the combination of an inclosed box having fourvertical walls and a closed top, the inclined vibrating board arrangedwithin the box to receive and support the middlings, ahorizontal throatat the front edge of the vibrating board 'for the passage of themiddlings, the spout-section connected to the top of the inclosed boxand adapted to receive thematerial and deliver it to the interior of thebox, and spring devices which support the front edge of the inclosedboard and permit it to yield under the weight of the middlings,substantially as set forth.

5. In avibrating feeder, the combination of an inclosed box, thevibrating board arranged front edge of the vibrating board, theadjusting-bolts and the springs connectingthe ad,-

'within the box, a discharging-throat at the,

7. In a vibrating feeder, the combination, with the vibrating carrier,the front vertical wall, the rear wall, andthe side walls, of thehangers, the bars projecting from the vibrating carrier, and theyielding links connecting the hangers with the projecting bars,substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES A. SMITH.

\Vitnesses:

GEo. T. SMITH, GEO. S. BENNETT.

